Evidence for a calorically costly negative consummatory contrast effect in rats
نویسندگان
چکیده
منابع مشابه
Effect of Neonatal Clomipramine Treatment on consummatory Successive Negative Contrast
Neonatal administration of clomipramine (CLI) produces physiological, neuroendocrinal and behavioral abnormalities in rats when they reach adulthood, which are similar to those observed in animal models of depression. In consummatory successive negative contrast (cSNC), rats that have had experience drinking 32% sucrose solution drink significantly less 4% sucrose solution than rats that have d...
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Aires, Ciencia y Tecnología, and by Grant 02782 from Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina, to A.E.M. The authors wish to express their thanks to Carlos Baratti and Cristina Acevedo for facilitating the use of the hot plate. María de los Angeles D ́Ambros and Pablo Gomez contributed to the training of rats for this experiment. Correspondence concerning this articl...
متن کاملBrain expression of pCREB in rats exposed to consummatory successive negative contrast.
A 32-to-4% sucrose devaluation leads to suppression of consummatory behavior relative to unshifted 4% sucrose controls. This is accompanied by an emotional response inducing memory consolidation. Expression levels of phosphorylated cyclic adenosine monophosphate response element-binding protein (pCREB, a marker of synaptic plasticity) were higher after the first devaluation session than after t...
متن کاملInsular cortex and consummatory successive negative contrast in the rat.
Rats that are expecting a high value reward (e.g., 1.0 M sucrose) show an exaggerated underresponding when they are instead given a low value reward (e.g., 0.15% saccharin), an effect termed successive negative contrast (SNC). In the present experiment, insular cortex-lesioned (ICX) rats showed normal responsivity to sucrose and saccharin prior to the reward downshift. However, when switched fr...
متن کاملOpioid receptors modulate recovery from consummatory successive negative contrast.
Three experiments explored the role of the opioid system in consummatory successive negative contrast. In Experiment 1, rats treated with the nonspecific opioid-receptor antagonist naloxone (2mg/kg) exhibited increased suppression after a shift from 32% to 6% sucrose solution (32-->6), relative to 6-->6 unshifted controls. A similar but shorter effect was observed with the delta-opioid receptor...
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ژورنال
عنوان ژورنال: Animal Learning & Behavior
سال: 1990
ISSN: 0090-4996,1532-5830
DOI: 10.3758/bf03205320